How do we know that salvation is only for sinners?

In the Bible, the doctrine of salvation is fundamentally centered around the acknowledgment that only sinners can be saved. Christ Himself declared, 'I came not to call the righteous, but sinners to repentance' (Matthew 9:13), highlighting that His mission was to offer redemption to those who recognize their need for grace. Additionally, Romans 5:8 affirms this by stating, 'God commendeth His love toward us, in that while we were yet sinners, Christ died for us.' This means that our recognition of sinfulness is essential to grasp the full breadth of God's grace; it is the very foundation of the gospel message, establishing that Christ's sacrificial love is directed toward those who are lost and in need of salvation.